The NimBLE host buffers that consume a significant amount of memory are
now allocated dynamically.
The advantage is that, the memory can be reclaimed in cases where BLE
is turned off and not required for the current boot cycle
Includes all the latest NimBLE stack changes from idf-v4.0 with few idf-v3.3
specific modifications.
- Addition of nimble component as submodule (`nimble-1.1.0-idf-v3.3`), contains
IDF v3.3 specific minor changes.
- Example applications are identical to idf-v4.0
- Modification in `bt/Kconfig` to accommodate NimBLE as a BT host.